66=2x-3(-x-7)

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Solution for 66=2x-3(-x-7) equation:


Simplifying
66 = 2x + -3(-1x + -7)

Reorder the terms:
66 = 2x + -3(-7 + -1x)
66 = 2x + (-7 * -3 + -1x * -3)
66 = 2x + (21 + 3x)

Reorder the terms:
66 = 21 + 2x + 3x

Combine like terms: 2x + 3x = 5x
66 = 21 + 5x

Solving
66 = 21 + 5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5x' to each side of the equation.
66 + -5x = 21 + 5x + -5x

Combine like terms: 5x + -5x = 0
66 + -5x = 21 + 0
66 + -5x = 21

Add '-66' to each side of the equation.
66 + -66 + -5x = 21 + -66

Combine like terms: 66 + -66 = 0
0 + -5x = 21 + -66
-5x = 21 + -66

Combine like terms: 21 + -66 = -45
-5x = -45

Divide each side by '-5'.
x = 9

Simplifying
x = 9

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